def test_objective_management(self):
builder = MPModelBuilder()
x = builder.add_binary_variable('x')
y = builder.add_binary_variable('y')
z = builder.add_binary_variable('z')
builder.set_objective(3.0 * x + 4.0 * y + 5.0 * z)
self.assert_equal(3.0 * x + 4.0 * y + 5.0 * z, builder.get_objective()._expr)
def test_variables_management(self):
builder = MPModelBuilder()
x = builder.add_binary_variable('x')
self.assert_equal('x', x.get_name())
y = builder.add_binary_variable('y')
self.assert_equal('y', y.get_name())
z = builder.add_binary_variable('z')
self.assert_equal('z', z.get_name())
self.assert_equal(3, builder.get_num_variables())
self.assert_equal([x, y, z], builder.get_variables())
def test_constraints_management(self):
builder = MPModelBuilder()
x = builder.add_binary_variable("x")
y = builder.add_binary_variable("y")
c1 = builder.add_constraint(5.0 * x + 3.0 * y <= 7, "c1")
self.assert_equal(1, builder.get_num_constraints())
self.assert_true(set([id(var) for var in c1.get_variables()]) ==
set([id(x), id(y)]))
c3 = builder.add_constraint(4.0 * x + 6.0 * y <= 5, "c3")
c2 = builder.add_constraint(2.0 * x + 2.0 * y <= 4, "c2")
self.assert_equal([c1, c3, c2], builder.get_constraints())
